This question may be better suited for /r/anthropology, because I know that a wide variety of cultures across Africa and almost certainly elsewhere practice scarification today.

I think you'll have a lot more luck with this question in /r/AskAnthropology.

I find German dueling scars very exciting. The German students still fence a lot but they hate their scars and they try to hide them. What I'd like to know is how it went out of fashion.